java - Java：如何使缓冲读取器循环输入文件，并运行一次代码块
问题描述
...抱歉长度... ...以及愚蠢的代码/文本条目。我还是菜鸟。
我需要通过 Trimble 差分校正日志文件（示例如下）进行解析，获取指定值，并将它们放入 .csv 文件中以供 QA 使用，然后再上传到 Oracle。我选择 Java 进行专业开发是因为它是用于开发其他内部软件的语言。
我指向一个文件，直到我可以得到正确的输出，然后我将继续遍历文件结构。
我的要求：读取日志（.txt UTF-16LE）并从几个最相似的文本块中获取特定值；然后在随后的大部分相似（但不同于第一个块）的文本块中找到附加值。将这些值放入一个 .csv 文件中，以便导入到每个日志文件的 QA 电子表格中。
文本块中的值可能会有所不同，但所有潜在的变化都是已知的。
我只关心文本的第一块，ATM。我感兴趣的所有值的正则表达式如下。
import java.io.*;
import java.nio.*;
import java.util.*;
import java.util.regex.*;
public class LogParser
{
public static void main (String[] args)throws IOException
{
//log file Reader init:
File corrFile = new File("D:\\Utilities\\Development\\Java\\HPGPSLogParser\\Correct_2015-10-13_10-51.txt");
BufferedReader corrReader = new BufferedReader(new InputStreamReader(new FileInputStream(corrFile),"UTF-16LE"));
String corrText = "";
String corrLine = "";
/*
NOTE: PFO diffcorr log files are encoded in UTF-16 LE
*/
//Writer init:
File stateCSV = new File("D:\\Utilities\\Development\\Java\\HPGPSLogParser\\MH.csv");
BufferedWriter corrWriter = new BufferedWriter(new FileWriter(stateCSV, true));
String fileText = "";
//output reader variables:
String corrOutput = "";
String outputLine = "";
//Management variables: ID location & specify actions:
String roverFile = "Rover file: ";
String procRoverFile = "Processing rover file, ";
String carrProcess = "";
String codeProces = "";
//regex variables:
Pattern fileName1 = Pattern.compile("Rover file: (?<fileName1>[A-Z]{2}-\\d{3}-\\d{5}-SP\\d\\.SSF)+");
Pattern noBase = Pattern.compile("(?<noBase>No matching base data found)");
Pattern totalCoverage = Pattern.compile("(?<totalCoverage>[\\d]{1,3})\\% total coverage");
Pattern coverageBy = Pattern.compile("(?<coverageBy>[\\d]{1,3})+\\% coverage by (?<baseStation>\\b\\w+\\b\\.[zZ].*)+", Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
Pattern carrierProcessing = Pattern.compile("Carrier processing\\.\\.\\.");
Pattern fileName2 = Pattern.compile("Processing rover file, (?<fileName2>[A-Z]{2}-\\d{3}-\\d{5}-SP\\d\\.SSF)+ \\.\\.\\.");
Pattern noProc = Pattern.compile("(?<noProc>No processing performed as base data does not have carrier data)");
Pattern noCarDat = Pattern.compile("(?<noCarDat>No carrier processing performed as file has no carrier data)");
Pattern selectedPositions = Pattern.compile("Selected (?<selectedPositions>\\d{1,6}) positions for post-processing");
Pattern correctedPositions = Pattern.compile("Corrected (?<correctedPositions>\\d{1,6}) positions");
Pattern correctFailed = Pattern.compile("Failed to correct (?<correctFailed>\\d{1,6}) positions");
Pattern carrierMissingBase = Pattern.compile("(?<carrierMissingBase>\\d{1,6}) of these were due to missing base data");
Pattern carrierInsuffSat = Pattern.compile("(?<carrierInsuffSat>\\d{1,6}) of these were due to insufficient satellites for position fix");
Pattern codeProcessing = Pattern.compile("Code processing\\.\\.\\.");
Pattern refGap = Pattern.compile("(?<refGap>Reference station data gap encountered: )");
Pattern codeChose = Pattern.compile("Chose (?<codeChose>\\d{1,6}) code solutions over the carrier solutions");
Pattern codeHighQual = Pattern.compile("(?<codeHighQual>\\d{1,6}) code solutions were of higher quality");
Pattern filtered = Pattern.compile("Filtered out (?<filtered>\\d{1,6}) uncorrected positions");
try(corrReader)
{
while ((corrLine = corrReader.readLine())!=null)
{
corrText = corrLine.trim();
Matcher carrProcMatcher = carrierProcessing.matcher(corrText);
if (corrText.contains(roverFile))
{
Matcher file1Matcher = fileName1.matcher(corrText); //first order variable based on 'Rover file: fileName1'
if(file1Matcher.find())
{
String firstFileName = file1Matcher.group("fileName1");
if (corrOutput.equals(""))
{
corrOutput += firstFileName+",";
} else {
corrOutput += "\n"+firstFileName+",";
} //end else
Matcher baseMatcher = noBase.matcher(corrText);
if(baseMatcher.find())
{
String noBaseText = baseMatcher.group("noBase");
if(noBaseText.equals("No matching base data found"))
{
corrOutput += "TRUE"+",";
} else {
corrOutput += ",";
} //end else
}
Matcher totCovMatcher = totalCoverage.matcher(corrText);
if(totCovMatcher.find())
{
String totalCovText = totCovMatcher.group("totalCoverage");
corrOutput += totalCovText+",";
}
Matcher covByMatcher = coverageBy.matcher(corrText);
if(covByMatcher.find())
{
String covByPct = covByMatcher.group("coverageBy");
String covByProvider = covByMatcher.group("baseStation");
corrOutput += covByPct+","+covByProvider+",";
}
corrWriter.write(corrOutput);
corrWriter.flush();
} // end file1Matcher if
} //end corrText.contains if
} //end while loop
// corrWriter.write(corrOutput);
corrWriter.close();
corrReader.close();
} //end try corrReader
} //end main method
} //end class
我感兴趣的日志文件的日志内容如下所示：
--------覆盖细节：--------
流动站文件：AA-123-12345-SP1.SSF
当地时间：2/11/2014 8:06:30 PM 至 2/11/2014 8:37:15 PM
100% 总覆盖率
guug04314054.zip 100% 覆盖
流动站文件：AA-321-54321-SP1.SSF
当地时间：2015 年 2 月 3 日下午 4:06:14 至 2015 年 2 月 3 日下午 4:06:44
0% 总覆盖率。未找到匹配的基础数据。
漫游者文件：AA-132-12354-SP2.SSF
当地时间：2/17/2014 5:51:01 PM 至 2/17/2014 6:18:57 PM
100% 总覆盖率
guug04914003.zip 的 4% 覆盖率
guug04914022.zip 100% 覆盖
我需要我的输出看起来像：
AA-123-12345-SP1.SSF,,100,100,guug04914003.zip,
或者
AA-312-12435-SP1.SSF,TRUE,0,,,
我的代码多次循环输入文件，生成重复条目。如何获得每个“漫游者文件：”文本块的单个输出条目？
谢谢！！
解决方案
只循环一次文件。随时随地阅读和收集数据。在获得所有数据之前不要构建输出。当您看到一个新Rover file条目时，写入输出（除非第一个条目）并清除值。当你到达终点时，写输出（如果有的话）。
在一个类中隔离代码可能更容易重用打印逻辑。
例子：
public final class LogEntry {
private final Pattern pattern = Pattern.compile("Rover file: (.*)" +
"|(\\d+)% total coverage" +
"|(\\d+)% coverage by (.*)");
private String roverFile;
private Integer totalCoverage;
private Map<String, Integer> fileCoverage = new LinkedHashMap<>();
public void process(BufferedReader in) throws IOException {
for (String line; (line = in.readLine()) != null; ) {
Matcher m = this.pattern.matcher(line);
if (! m.matches())
continue;
if (m.start(1) != -1) {
print();
clear();
this.roverFile = m.group(1);
} else if (m.start(2) != -1) {
this.totalCoverage = Integer.valueOf(m.group(2));
} else if (m.start(3) != -1) {
this.fileCoverage.put(m.group(4), Integer.valueOf(m.group(3)));
}
}
print();
}
private void clear() {
this.roverFile = null;
this.totalCoverage = null;
this.fileCoverage.clear();
}
private void print() {
if (this.roverFile == null)
return;
if (this.fileCoverage.isEmpty()) {
System.out.println(this.roverFile + "," + this.totalCoverage);
} else {
for (Entry<String, Integer> entry : this.fileCoverage.entrySet()) {
System.out.println(this.roverFile + "," + this.totalCoverage + "," + entry.getValue() + "," + entry.getKey());
}
}
}
}
测试
String input = "Rover file: AA-123-12345-SP1.SSF\n" +
"Local time: 2/11/2014 8:06:30 PM to 2/11/2014 8:37:15 PM\n" +
"100% total coverage\n" +
"100% coverage by guug04314054.zip\n" +
"Rover file: AA-321-54321-SP1.SSF\n" +
"Local time: 2/3/2015 4:06:14 PM to 2/3/2015 4:06:44 PM\n" +
"0% total coverage. No matching base data found.\n" +
"Rover file: AA-132-12354-SP2.SSF\n" +
"Local time: 2/17/2014 5:51:01 PM to 2/17/2014 6:18:57 PM\n" +
"100% total coverage\n" +
"4% coverage by guug04914003.zip\n" +
"100% coverage by guug04914022.zip\n";
try (BufferedReader in = new BufferedReader(new StringReader(input))) {
new LogEntry().process(in);
}
输出
AA-123-12345-SP1.SSF,100,100,guug04314054.zip
AA-321-54321-SP1.SSF,0
AA-132-12354-SP2.SSF,100,4,guug04914003.zip
AA-132-12354-SP2.SSF,100,100,guug04914022.zip
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